Update: Well, we're still working on it but I suspect it is the "wiggly word" as I like to call it. If you can't get a comment to go through, try it again. You'll get a different word that might be easier to read.
Update No. 2: For my latest comment I signed out so as to approach the blog "by surprise" as it were. I think some of the problem may be with the "profile". First of all, I can't remember any of my google etc. ID's and passwords so I just used "Anonymous" and that worked.